package cn.hebutrun.oulabot.common.util;

import javax.servlet.http.HttpServletRequest;

/**
 * ip工具
 *
 * @author zhaolong
 */
public class IPUtil {

  private static final String UNKNOWN = "unknown";

  /**
   * 获取请求的ip
   *
   * @param request 请求对象
   * @return ip
   */
  public static String getIP(HttpServletRequest request) {
    String ip = request.getHeader("x-forwarded-for");
    if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
      ip = request.getHeader("Proxy-Client-IP");
    }
    if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
      ip = request.getHeader("WL-Proxy-Client-IP");
    }
    if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
      ip = request.getRemoteAddr();
    }
    return ip;
  }
}
